TWI668944B - Insulation bobbin and stator unit structure and servo-motor structure using the same - Google Patents

Abstract

An insulating sleeve is provided herein. The insulating sleeve includes a winding portion, an outer blocking portion, and an inner blocking portion. The winding portion has an outer side and an inner side. The outer stopper is connected to the outer side of the winding portion. The outer block has an upper surface. The outer stop portion includes two interfaces extending downward from the upper surface. The two interfaces each have a cross-sectional shape which is substantially a combination of a circle and a rectangle. The inner stop is connected to the inner side of the winding portion.

Description

Insulating bushing, and stator unit structure and servo motor using same structure

The present invention relates to an insulating sleeve, and a stator unit structure and a servo motor structure using the same. More particularly, the present invention relates to an insulating sleeve having a universal interface, and a stator unit structure and a servo motor structure using the same.

The motor converts electrical energy into mechanical energy and is widely used in a variety of applications such as lathes, transmissions, and robots. Generally, the motor includes a stator structure and a rotor structure. A coil is wound around the stator structure to generate a magnetic field around the rotor structure by passing a current through the coil, thereby driving the rotor structure to rotate, so that the electrical energy is converted into mechanical energy. In order to correspond to the application in various articles, the structural details of the motor can be adjusted. However, customizing all structural details rather than adopting a common structure can result in process complication and cost increases.

Embodiments of the present invention adjust the components of the motor to provide a common structure that allows for the matching of different types of components.

In an aspect of the invention, an insulating sleeve is provided. The insulating sleeve includes a winding portion, an outer blocking portion, and an inner blocking portion. The winding portion has an outer side and an inner side. The outer stopper is connected to the outer side of the winding portion. The outer block has an upper surface. The outer stop portion includes two interfaces extending downward from the upper surface. The two interfaces each have a cross-sectional shape which is substantially a combination of a circle and a rectangle. The inner stop is connected to the inner side of the winding portion.

In another aspect of the invention, a stator unit structure is provided. The stator unit structure includes a metal core and two insulating sleeves. Two insulating sleeves are respectively disposed at both ends of the metal core. Each of the insulating sleeves includes a winding portion, an outer blocking portion, and an inner blocking portion. The winding portion has an outer side and an inner side. The outer stopper is connected to the outer side of the winding portion. The outer block has an upper surface. The outer stop portion includes two interfaces extending downward from the upper surface. The two interfaces each have a cross-sectional shape which is substantially a combination of a circle and a rectangle. The inner stop is connected to the inner side of the winding portion.

In yet another aspect of the invention, a servo motor structure is provided. The servo motor structure includes a stator unit structure in accordance with any of the embodiments.

The insulating sleeve of the present invention provides a universal interface that allows for different types of pins to be used, even without the use of different types of cylindrical and rectangular pins, without changing the design of the insulating sleeve. Therefore, a single type of mold can be used to produce an insulating sleeve that can be used with different types of pins. For the production of the stator unit structure and the servo motor structure formed therefrom, the process and cost can be simplified.

In order to provide a better understanding of the above and other aspects of the present invention, the following detailed description of the embodiments and the embodiments,

10‧‧‧Insulation casing

12‧‧‧ Winding Department

14‧‧‧External

16‧‧‧Internal section

18‧‧‧ outside

20‧‧‧ inside

22‧‧‧ upper surface

24‧‧‧ interface

26‧‧‧Chamfering

28‧‧‧ lead slot

29‧‧‧Bevel

30‧‧‧ Section

31‧‧‧ Section

32‧‧‧Winning table

34‧‧‧First Extension

36‧‧‧Second extension

38‧‧‧ first side

40‧‧‧ second side

42‧‧‧ third side

44‧‧‧ fourth side

50‧‧‧STAR unit structure

52‧‧‧Metal core

54‧‧‧ first end

56‧‧‧ second end

58‧‧‧First recess

60‧‧‧Second recess

62‧‧‧ pins

64‧‧‧ coil

66‧‧‧Flexible insulating film

70‧‧‧STAR unit structure

72‧‧‧ pins

100‧‧‧Servo motor structure

101‧‧‧shell

102‧‧‧ hollow body

103‧‧‧First bearing

104‧‧‧second bearing

105‧‧‧Stator assembly structure

105a‧‧‧ pins

106‧‧‧Rotor structure

107‧‧‧ shaft

108‧‧‧First bearing fixture

109‧‧‧Second bearing fixings

110‧‧‧Circuit board

111‧‧‧Control unit

A‧‧‧ section shape

D‧‧‧diameter

L‧‧‧ Length

T1‧‧ depth

T2‧‧‧depth

T3‧‧‧depth

w‧‧‧Width

Fig. 1A is a perspective view of an insulating sleeve according to an embodiment.

Figure 1B is a top view of an insulating sleeve in accordance with an embodiment.

Fig. 1C is a cross-sectional view taken along line 1C-1C' of Fig. 1A of the insulating sleeve according to the embodiment.

Fig. 2A is an exploded view of the stator unit structure of an embodiment.

Fig. 2B is a perspective view showing the structure of the stator unit of an embodiment.

Fig. 3A is an exploded view of the stator unit structure of another embodiment.

Fig. 3B is a perspective view showing the structure of the stator unit of another embodiment.

Fig. 4 is a schematic view showing the structure of a servo motor according to an embodiment.

The invention will be described in detail below in conjunction with the drawings. It is to be understood that the appended claims are not intended to limit the scope of the invention. For example, elements in the drawings may not be shown in the actual scale. Furthermore, it is contemplated that elements, conditions and features of one embodiment can be advantageously incorporated in another embodiment, which is not further enumerated.

1A-1C, which shows an insulating sleeve 10 according to an embodiment, wherein FIG. 1A is a perspective view of the insulating sleeve 10, FIG. 1B is a top view of the insulating sleeve 10, and FIG. 1C is an insulation. A cross-sectional view of the sleeve 10 along line 1C-1C' in the first panel of Fig. 1A.

The insulating sleeve 10 includes a winding portion 12, an outer blocking portion 14, and an inner blocking portion 16. The winding portion 12 has an outer side 18 and an inner side 20. The outer stop portion 14 is coupled to the outer side 18 of the winding portion 12. The outer stop portion 14 has an upper surface 22. The outer stop portion includes 14 two ports 24 extending downwardly from the upper surface 22. The two interfaces 24 each have a cross-sectional shape A, and the cross-sectional shape A is substantially a combination of a circle and a rectangle. As used herein, the term "substantially" means that although the interface 24 may include other portions such as chamfers 26, lead slots 28, etc., the user can readily recognize that the interface 24 has a circular shape. A cross-sectional shape A combined with a rectangle. The inner stop portion 16 is connected to the inner side 20 of the winding portion 12.

According to some embodiments, as shown in FIG. 1B, the cross-sectional shape A of the two interfaces 24 may be substantially a combination of circular and rectangular conformal centers. The portion 24 of the interface 24 having a rectangular shape corresponding to the cross-sectional shape A may have a depth t1, and the portion 31 of the circle corresponding to the cross-sectional shape A may have a depth t2 which may be equal to the depth t2. However, the depth of the interface 24 need not be particularly limited. For example, corresponding to a deeper cylindrical pin, the depth t2 can be made larger than the depth t1.

In some embodiments, to facilitate insertion of the pins, the two interfaces 24 may be formed with chamfers 26 along the cross-sectional shape A at the attachment upper surface 22. The formation of the chamfer 26 is not particularly limited. For example, the chamfer 26 may be formed only for a portion of the cross-sectional shape A, such as only the portion 30 of the rectangle corresponding to the cross-sectional shape A. Alternatively, the chamfer 26 may be formed corresponding to the entire cross-sectional shape A, for example, a portion 30 formed in a rectangle corresponding to the cross-sectional shape A and formed in a circular portion 31 corresponding to the cross-sectional shape A.

In some embodiments, to facilitate the connection of the coils, the two interfaces 24 can each further include a lead slot 28. The lead groove 28 extends downward from the upper surface 22 to communicate the circular portion 31 of each of the interfaces 24 corresponding to the cross-sectional shape A. The lead slots 28 of each interface 24 can have a depth t3. In order to provide a better coil end guiding effect, the depth t3 may be greater than the depth t1/t2 of the portion of the respective interface 24 corresponding to the cross-sectional shape A. Further, in order to provide a better coil end guiding effect, each of the lead grooves 28 may be formed with a slope 29 which extends toward the outer lower side of the lead groove 28, that is, toward the winding portion 12.

According to some embodiments, the winding portion 12 can include a winding station portion 32, a first extension portion 34, and a second extension portion 36. As shown in FIG. 1B, the winding table portion 32 has a first side 38, a second side 40, a third side 42, and a fourth side 44. The first side 38 and the second side 40 are opposite sides. The first side 38 and the second side 40 are respectively disposed on the outer side 18 and the inner side 20 of the winding portion 12, and the third side 42 and the fourth side 44 are disposed on opposite sides. The first extension 34 connects the third side 42 of the winding table 32 and extends away from the upper surface 22. The second extension 36 is coupled to the fourth side 44 of the winding table portion 32 and extends away from the upper surface 22. The first extension portion 34 is spaced apart from the second extension portion 36. In some embodiments, as shown in FIG. 1C, the length of the first extension 34 may not be equal to the length of the second extension 36.

According to some embodiments, as shown in FIG. 1A, the outer stop portion 14 and the inner stop portion 16 may protrude above the winding portion 12, particularly above the winding table portion 32, thereby facilitating winding of the coil.

The insulating sleeve 10 can be formed from plastic, in particular from a voltage-resistant and insulating plastic. In some embodiments, the plastic meets the requirements listed in Table 1, for example, DR 48 (PBT) plastic can be used. In the case where the insulating sleeve 10 is formed of plastic, the size of the interface 24 can be tolerated to be slightly smaller than the correspondingly used pin, and the elasticity of the plastic will allow slight deformation to accommodate the pin and securely fix it. Specifically, the cross-sectional shape A of the two interfaces 24 has a diameter d at the corresponding circular portion 31, and the two interfaces 24 can be configured such that when the pins are not inserted, the diameter d is smaller than the two interfaces 24 to be inserted. One diameter of the cylindrical pin. Alternatively or additionally, the cross-sectional shape A of the two interfaces 24 has a length 1 and a width w at the portion 30 of the corresponding rectangle, the two interfaces 24 being configurable to have a length 1 and the width when the pins have not been inserted w is smaller than a length and a width of the rectangular pins to be inserted into the two interfaces 24, respectively. According to some embodiments, the insulating sleeve 10 can be formed in an integrally formed manner.

Referring to FIGS. 2A-2B, there is shown a stator unit structure 50 according to an embodiment, wherein FIG. 2A is an exploded view of the stator unit structure 50, and FIG. 2B is a perspective view of the stator unit structure 50. The stator unit structure 50 includes a metal core 52 and two insulating sleeves 10. The metal core 52 has two ends, a first end 54 and a second end 56. Two insulating sleeves 10 are respectively disposed at the first end 54 and the second end 56 of the metal core 52, and the upper insulating sleeve 10 is disposed opposite to the lower insulating sleeve 10 such that the first extension of the upper insulating sleeve 10 34 corresponds to the second extension 36 of the lower insulating sleeve 10, and the second extension 36 of the upper insulating sleeve 10 corresponds to the first extension 34 of the lower insulating sleeve 10. As described with reference to FIGS. 1A-1C, each of the insulating sleeves 10 includes a winding portion 12, an outer stopper portion 14, and an inner stopper portion 16. The winding portion 12 has an outer side 18 and an inner side 20. The outer stop portion 14 is coupled to the outer side 18 of the winding portion 12. The outer stop portion 14 has an upper surface 22. The outer stop portion 14 includes two interfaces 24 that extend downwardly from the upper surface 22. The two interfaces 24 each have a cross-sectional shape A, and the cross-sectional shape A is substantially a combination of a circle and a rectangle. The inner stop portion 16 is connected to the inner side 20 of the winding portion 12. Further, the insulating sleeve 10 can have the features mentioned in any of the foregoing embodiments. According to some embodiments, the metal core 52 has a first inner recess 58 and a second inner recess 60. The first inner recess 58 and the second inner recess 60 are located at the two ends of the metal core 52 (ie, the first end 54 and Between the second ends 56), the winding portion 12 has a winding table portion 32, a first extending portion 34 and a second extending portion 36 extending from both sides of the winding table portion 32, and the upper insulating sleeve 10 The first extension portion 34 and the second extension portion 36 extend to the first inner recess portion 58 and the first The two inner recesses 60, the first extension portion 34 and the second extension portion 36 of the lower insulating sleeve 10 extend to the second inner recess portion 60 and the first inner recess portion 58, respectively.

According to some embodiments, the stator unit structure 50 may further include two pins 62, a coil 64, and two flexible insulating films 66. Two pins 62 are respectively inserted into the two interfaces 24 of one of the two insulating sleeves 10, for example, into the two interfaces 24 of the insulating sleeve 10 disposed at the first end 54 of the metal core 52. The two pins 62 used in the stator unit structure 50 have a circular cross-sectional shape, and the pin 62 having a circular cross-sectional shape is referred to herein as a cylindrical pin. Such pins 62 are typically used to couple circuit boards, such as but not limited to use on a 1 kW servo motor. The coil 64 is wound around the two insulating sleeves 10 along the first extension 34, the winding table 32 and the second extension 36. The coil 64 is electrically connected to the two pins 62. The two flexible insulating films 66 cover the first inner recess 58 and the second inner recess 60, respectively, to isolate the coil 64 and the metal core 52. In addition, the flexible insulating film 66 can further electrically isolate the coils 64 of the two stator unit structures 50 disposed adjacently by covering the first inner recess 58 and the second inner recess 60 of the metal core 52.

Referring to FIGS. 3A-3B, another stator unit structure 70 is illustrated in accordance with an embodiment, wherein FIG. 3A is an exploded view of the stator unit structure 70 and FIG. 3B is a perspective view of the stator unit structure 70. The two pins 72 used in the stator unit structure 70 have a rectangular cross-sectional shape, and the pins 72 having a rectangular cross-sectional shape are referred to herein as rectangular pins. Such pins 72 are typically applied to manual winding of the coil, such as, but not limited to, being used on a 2 kW servo motor. Other details of the stator unit structure 70 are the same as the stator unit structure 50 and will not be described herein.

It can be understood that, since the insulating sleeve 10 according to the embodiment provides a universal interface 24 that allows matching of different types of pins, as shown in FIGS. 2A-2B and 3A-3B, even if different types of cylindrical joints are used together The foot 62 and the rectangular pin 72 do not need to change the design of the insulating sleeve 10. Therefore, a single type of mold can be used to produce an insulating sleeve that can be used with different types of pins. For the production of the stator unit structure and the servo motor structure formed therefrom, the process and cost can be simplified.

Referring to Figure 4, there is shown a servo motor structure 100 according to an embodiment comprising a stator unit structure according to any of the preceding embodiments. Specifically, the servo motor structure 100 includes a housing 101 including a hollow body 102, a first bearing 103, and a second bearing 104 coupled to the first bearing 103 and the second bearing Between 104. The servo motor structure 100 further includes a stator substructure 105 and a rotor structure 106. The stator assembly structure 105 is disposed in the hollow body 102. The stator assembly structure 105 includes a plurality of stator unit structures, such as a stator unit structure 50 or a stator unit structure 70, configured in a circumferential manner, the stator unit structures forming a surrounding space. The rotor structure 106 is disposed in a surrounding space formed by the stator assembly structure 105. The rotor structure 106 includes a rotating shaft 107 coupled to the first bearing 102 and the second bearing 103. According to some embodiments, the housing may further include a first bearing fixture 108 and a second bearing fixture 109, thereby being secured to articles such as lathes, transmissions, and robots that utilize servo motors. Here, the pin 105a for the stator assembly structure 105 is exemplified by a cylindrical pin, which can be coupled to the circuit board 110 and further electrically connected to the control unit 111 of the servo motor structure 100. can It is to be understood that the control unit 111 can also be electrically connected using rectangular pins. It will also be appreciated that the servo motor structure 100 is for example only, and the application of the insulating sleeve 10 and the stator unit structure using the same according to the embodiment is not limited to a particular servo motor structure as long as it is compatible.

In conclusion, the present invention has been disclosed in the above embodiments and embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (12)

An insulating sleeve includes: a winding portion having an outer side and an inner side; an outer blocking portion connecting the outer side of the winding portion, the outer blocking portion having an upper surface, the outer blocking portion comprising: two An interface extending downward from the upper surface, the two interfaces each having a cross-sectional shape substantially a combination of a circle and a rectangle; and an inner stop connecting the inner side of the winding portion. The insulating sleeve of claim 1, wherein the cross-sectional shape of the two interfaces is substantially a combination of the circular shape and the rectangular concentric shape. The insulating sleeve of claim 1, wherein the two interfaces are chamfered along the cross-sectional shape at the connection of the upper surface. The insulating sleeve of claim 1, wherein the two interfaces further comprise a lead slot extending downward from the upper surface to communicate the circular portion of each of the interfaces corresponding to the cross-sectional shape. The insulating sleeve of claim 4, wherein the lead groove of each of the interfaces has a depth extending downward from the upper surface, the depth being greater than a depth of a portion of each of the interfaces corresponding to the cross-sectional shape. The insulating sleeve of claim 1, wherein the cross-sectional shape of the two interfaces has a diameter at a portion corresponding to a circular shape, and the two connections The port is configured such that when the pin has not been inserted, the diameter is smaller than a diameter of the cylindrical pin to be inserted into the two interfaces. The insulating sleeve of claim 1, wherein the cross-sectional shape of the two interfaces has a length and a width at a portion corresponding to the rectangular shape, and the two interfaces are configured such that when the pins are not inserted, The length and the width are respectively less than a length and a width of the rectangular pins to be inserted into the two interfaces. The insulating sleeve of claim 1, wherein the winding portion comprises: a winding portion having a first side, a second side, a third side, and a fourth side, The first side and the second side are opposite sides, and the first side and the second side are respectively located on the outer side and the inner side of the winding portion, and the third side and the fourth side are disposed on opposite sides; a first extending portion connecting the third side of the winding table portion and extending away from the upper surface; and a second extending portion connecting the fourth side of the winding table portion and extending away from the upper surface, The first extension is spaced apart from the second extension. The insulating sleeve of claim 8, wherein the length of the first extension is not equal to the length of the second extension. A stator unit structure comprising: a metal core; Two insulating sleeves respectively disposed at opposite ends of the metal core, each of the insulating sleeves comprising: a winding portion having an outer side and an inner side; and an outer blocking portion connecting the outer side of the winding portion The outer stop portion has an upper surface, and the outer stop portion includes: two interfaces extending downward from the upper surface, the two interfaces respectively having a cross-sectional shape, the cross-sectional shape being substantially a circular shape and a rectangular shape a combination; and an inner stop connecting the inner side of the winding portion. The stator unit structure of claim 10, wherein the metal core has a first inner recess and a second inner recess, the first inner recess and the second inner recess being located at opposite sides of the metal core Between the ends, the winding portion has a winding portion, a first extending portion and a second extending portion extending from both sides of the winding portion, the first of the two insulating sleeves The extension portion and the second extension portion respectively extend to the first inner recess portion and the second inner recess portion, and the first extension portion and the second extension portion of the other of the two insulating sleeves respectively extend to the first portion The second recessed portion and the first recessed portion, and the stator unit structure further includes: two pins respectively inserted into the two interfaces of one of the two insulating sleeves, the two pins having a circular cross-sectional shape Or a rectangular cross-sectional shape; a coil along the first extension portion, the winding table portion and the second extension portion for winding on the two insulating sleeves, the coil electrically connecting the two pins ;as well as Two flexible insulating films respectively covering the first inner recess and the second inner recess to isolate the coil and the metal core. A servo motor structure comprising the stator unit structure according to any one of claims 10 to 11.